I can't seem to cycle through the different resolutions in my XF86Config.

My laptop (Dell D800) does not have a numeric keypad on the right. But if you press the fn key, you can use some of the regular keys as numeric keypad. But I try pressing ctrl-alt-fn-+ and it does not work.

How exactly does one use RandR? I read the window manager has to support it. Does icewm? Couldn't find much info and the randr man page is kinda limited. And once it's working how does one cycle/change refresh/res on the fly? Still alt ctrl +?